Tubes, Fuses, Power Requirements, etc

Tubes, Fuses, Power Requirements, etc.

The OD-100 is a 100watt+amplifier utilizing 4 5881 output tubes and 6 12AX7 preamp tubes to achieve it’s glorious, robust and delightful tube tone. If you want to be a wise guy and run at a lower power output, remove the 2 outside power tubes and use a speaker output jack that is one tap lower than the cabinet impedance you are using. Example: If you are using a 16ohm cabinet, use an 8ohm output jack; if your cabinet is 8ohms, use a 4ohm jack. Another tip: Try a 12AU7 in the phase inverter socket which will help lower the power as well. The phase inverter is the tube nearest the output transformer, toward the center of the chassis.

PLEASE CONSULT THE FACTORY IF YOU HAVE ANY QUESTIONS REGARDING THIS PROCEDURE!

The Power Fuse is located in the Power Entry Module and is a 4amp Slo Blo. The H.T. Fuse is a 1amp Fast Blo.

The OD-100 is World Wide Voltage capable. Voltage selection is made externally at the Power Entry Module. See diagram for details.

Housing

Indicator Pin

Voltage selector card

Cover / Fuse block assembly

100V

120V

220V

240-230V

To change selected voltage:

Open cover using small blade screwdriver or similar tool. Set aside cover/fuse block assembly. Pull voltage selector card straight out of housing, using indicator pin orient selector card so that the desired voltage is readable at the bottom (see above). Fix indicator pin into notch at opposite side. Insert voltage selector card into housing, printed side of card facing towards on/off switch and edge containing the desired voltage first. Replace cover and verify that the indicator pin shows the desired voltage on the cover assembly. USE PROPER FUSE for voltage selected.

100V = use 4amp slow blow, 120V = use 4amp slow blow, 220V = use 2amp slow blow, 230V-240V = use 2amp slow blow